The sea demon Tiel moved into the Cecil feudal lord's official residence, becoming neighbors with Heidi and Rebecca.
To this Miss Sea Demon who'd always been living in the deep sea, the human world was novel and fascinating —— although sea demons do go ashore occasionally to travel around, that was something that only the exuberant and overly curious among them did. As for Tiel whose favorite hobby in life was to hibernate to her death, she clearly wouldn't have such thoughts that were an extreme waste of time —— if she hadn't swum in the wrong direction, she probably wouldn't have come to his land located on the west of the ocean for her whole life.
But now that she'd already arrived at this place by some strange chance and seen the human world, Tiel suddenly felt that… moving about outside once in a while seemed pretty interesting too!